I just installed lubuntu 17.04 without problems. The pc also connects to my wifi, but I can not go to any websites in firefox (or search for updates etc.).
I tried connecting it to the router with an ethernet cable, which gave the same result.
I can ping the DNS ip adress (127.0.0.53) without problems.
I have tried removing the battery and waiting a bit again as recommended on other pages.
What should I try next? I am new to ubuntu.